The United States of America's government system of three branches (Legislative, Executive, and Judicial) was derived from Isaiah 33:22.
In every country, believers should be the most faithful and conscientious citizens. Believers are to do this, not for personal gain, but for the Lord’s sake.
There are times when we attempt to do the right thing only to have our motive judged as impure. In such times, we can learn much from David's example.